Locking device.



H. J. SELK.

LOCKING DEVICE.

APPLICATION FILED ocT.27. 1914.

1 ,1 60,535. Patented Nov. 16, 1915.

of the bar.

' HERMAN a. semi, or SPOKANE, w asiinvsrcn.

LOCKING DEVICE.

To all whom it may concern Be it known that I, HERMAN J. SELK, a citizen of the United States, residing at Spokane, in thecounty of Spokane and State of Washington, have invented certain new and useful Improvementsin' Locking Devices,"of which the following is a'specification.

The object of this invention is to provide an improved form of locking device wherein reliance is placed upon engagement of structural parts againstea'ch other for looking a supported body against relative move ment in one direction with respect to its supporting body. V.

- My invention'moreparticularly consists in providing a cylinder head orlike'part witha trulysemi-circular recess which is struck from one center which has a single radial length as regards all curved portions of the recess. The end of the; tube bar, which may be properly termed a supporting body, is likewise provided with a pcripheral portion struck from a single center, of a single radius, and proportioned to fit said recess. Thus all ofthe recesses of all of the cylinder heads made, will be standard, and can be drilled out at a single operation by holdingthe cylinder heads in fiat abutting relation and forcing a drill through all of the heads at one time. I I

In the most improved embodimentof my invention, the stop portions ofthe recesses are tangentially disposediand extend from a point inside of the periphery of the head to a point intersecting the'latter, 1 the segmental heads being provided with complementally formed and tangentially disposed stops for engaging the stops of therecesses, thelatter preferably being cavities and the former p'rojections.- e

Other objects and features of the invention will be more fully described in connection with the accompanying drawing: and will be more particularly pointedout and ascertained in andiby'th'e appended claims.

In the drawing :--Figure-1 is an end view showing a cylinder head equippedwith the device of my invention. Fig. 2 is an'end view of one of the-tooth supporting bars showing the contour of the segmental end Fig. 3 is a view in side elevation looking in the direction of arrow 3 of Fig. 2. Fig; 4 is a perspective view on an enlarged scale of a portion ofacylinder head showing the formationofithe segmen- Specification of Letters Patent.

, ures of r the drawing.

talv recess. Fig. 5

As illustrated, and referring more particularly to Figs.-1 to 4, 1 designates one ofthe heads of a threshing cylinder in the of equi-distantlyspaced recesses 2. Each recess, as will be more particularly seen by reference toFig. 4, consists of a. substan: tially rounded or cylindrical cavity of Patented Nov. 16,1915. Application filedflctober zmaia seriauvo.858,853. Y

is aview in elevation, partly in section, showing a modified form --Flg. 6 1s a sectional view I the different figperiphery ofnvhiclr is formed a plurality slighly morethan a semi-circle, as indicated as a wholeat 2. The recess opens into the peripheral face 8; of the cylinder head 1, and is shown extending transversely through the head, thereby forming an open ended recess. The mouth or entrance of the recess,

as indicated at a, is somewhat reduced with Y respect to the greatest dimension of the recess, HSJIIClICatGCl at 5, so that when the segmentahtooth bar end is positioned in the recess, lt'Wlll be effectively prevented from .being dislodged radially therefrom. In order to prevent the segmental rod ends from turning or rotating in one direction, when they are seated in their recesses, each recess is provided withone or more stop portions, two being shown, hich are in the form of flattened faces 6. Theflattened faces or portions 6 arev disposed tangentially with respect to the interior face 7 of their recess, andare shown-as extending from within the periphery 3 to a point intersecting the periphery Furthermore,-it will be notedthat the tangential stopportions 6-are relatively reduced in width with respect to the total width of the'cyli'nder head 1 so as to leave a central portion 8, forming, a continuation of the semi-circular face 7. At

'onepointin the recessis drilled'or otherwise formed aholding socket 9, as clearly indicated inFig; a. Thedirection of rotation of the threshing cylinder is indicated by the arrow shown in, Fig. 1', and attention is directed to the fact that the stop por- "bars; as indicated at 12, are shown somewhat enraged with ra ed to the; cifoss'section of the bars and are shaped to conform to thecontour of the cavities 'or'r'e-' cesses 2 for insertion and anchorage there in. Byreference' to Fig. 2, it will be seen that the ends 12 constitute a segmental head of more than a-sei'ni-circle, the hat outer face l3being adapted to lie tlusli with the pe ripherylof the cylinder head 1. Insertion of the segmental bar head 12 into the; recess 2, iseffected by tilting thebars, in the direc tion of; rotation of the cylinder 1, as indif. cated by the tilted position of one of the bars of. Fig. 1*.

bars in Fig. .1. The bar will then'be turned ina direction opposite to the direction of rotationof the cylinder'l uiitilit attains the position occupied by 'the remaindero-f the Now the thrust due to: work-- 7. ing action ofthe threshing cylinder under load, tends toforcethe' teeth in the direction of arrow a, of Fig. 1, and it is with, a view of effectively supporting the toothobar againstsuchmovement, by abutting rigid parts; that the present invention is ad'- dressed-r f The segmental heads" 12 are providedwith tangentially disposed projections 14-, "which are shaped to engage the tangential stops6 and which, as will now be seen, face in adirectionopposite to the direction of rotation of the threshing cylinder. 7 The pro ecting 7 stops are each'equal in width to the recess stops 6 so that there is an intervening por- "tion '15, between the stops 14:, for receiving that portion Swhich lsfi continuation of the semicircular recess face 7 I 1 .Now' it-will be clearly seen that when the male or projecting stopsaare moved into-a finalposition so'thatthey lie upon opposite sides of the; portion S -ofthe recess, that it will be impossible forthe tooth bars to have any longitudinal play whatsoever, the bar being locked, against turning movement-"in one directionandagainst longitudinal movement in either direction;

ging or choking by an excess of straw, then.

I the bars-might possibly become loosened.

] isappliedand therefore the bolt 16 does not :I- therefore. provide means which may be in the-formof a bolt 16, threaded through the head 12 and projecting-intothe'socket 9, which serves to preventmovementof the tooth barsi'n thedirection of arrow'b.- HoW- ever, the engagement; of the bolt 6 with the socket 9 is notlsufliciently tightf'to wholly sustain the tooth bars'against turning movement the (111661310111111 which load or stress in any sense take the placeof or' supplement the stops 6 and liias theparts are; so ar In' practice, the stress imposed upon the teeth 11 to rock'the arranged and proportioned that the bolt 16 will notac't to talre up stress in the'direction of arrow a.

form of the invention in'which the cylinder head equipped, preferably on its inside face, with a stop segment or portion 18-.

In Figs. 5 and 6, I have shown a modified ,Thebar 19, on which the teeth are carried, 7 is provided with an end or head 20 which is shown flattened; on one side. The. head 20 isprovided with astud 21 for engagement with. the endi of the segmental-"stop 18 to resist turning movement of the head in the recess- 22, beyond a predetermined extent.

'lflie'sto'p portions 2-1and 18 function in the same maniner'asthe' stop portions 15 and-14: but are of adifferent formation. -The stop "21 is provided with a shank 23 which may be'iii'se rted in the head 20 so that iii-case of breakage, the stop 21 could be renewed without requiring renewal ofthe entire bar,1 9.

The head; 20 is shown provided with a bolt 2-4, the iuncti'on of which is; similar to' that of bolt 16.

l A: feature common tofboth ofiithe invention shown consistsgin thelfiat abutting faces which are brought in flat engageinent against each other-to-resist movement of the tooth bars in one direction, which is the direction in which stress is imposed. I 7 While I have herein shown and described the device ofin-y invention as applied to the toothbar of a threshing cylinder, it willbe understood that broadly considered, the ends of the toothbarv comprise the'supported elements, while the cylinders with their segmental recesses comprise the supporting elements, in accordance with the utility to which; the device is applied.

It is believed that my-invent 'on will be clearly understood from the foregoing-description and whilel have herein shown and ice described specific '1 forrnlslthereofll do not wish to be, limited thereto except forlsuch f limitations as theclaims l m: a t 1*. A cylinder head having a peripherally disposed segmental :reces's greater than a may import.

fromysaid recess at opposite margins of the recess to, form laterally disposed stops, and 'a s'egmental supporting body proportioned to fit in said recess and having laterally disposed stops projecting from its periphery for engagement with the" cut away stops of; said recess} to arrest turning movement of said segmental body in said recess under working thrust beyond a predetermined extent and lock saidbody againstlateral movement in said cylinder head,; s'ubstantiall'y' asdescribed. i

iia

'seini-circle'andoneterrnin'al portion of the T face of said recess being-cut away outwardly 2; A-cylinder head having-la peripherally disposed segmental recess-greater than a semi-circleand beingstruck from a single center with a single radius and having a stop portion formed in said recess, and a segmental supporting body having a pcriphery struck from a single center with a single radius and proportioned to fit said recess andsaid body having a stop portion formed in its periphery for engagement with the stop of said recess to arrest turning movement of said body in said recess under working thrust, substantially as described.

3. A cylinder head having a peripherally disposed segmental recess greater than a semi-circle and being struck from a single center and one portion of said recess being cut awayto form a stop portion disposed tangentially to said recess, and a segmental supporting body having a peripheral portion struck from a single center andprovided with a stop projecting fromits periphery and disposed tangentially thereto for engagement with said cutaway stop to supporting body having a periphery struck from a single center with a single radius and proportioned to fit said recess, said body and head having coactlng portlons for preventing rotation of said head with respect to said body, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses. I

HERMAN J. SELK. Witnesses:

HAROLD SCANTLEBURY, EDNA BRoYLEs.

Gopies'of this patent may befobtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

